BMW M will attempt to achieve this weight by expanding the use of carbon fiber from the current areas (roof, trunk, drive shaft, strut brace) to include the hood and front wings, while also switching the steel doors to aluminum construction. Of course, the interior will also see weight reduction by way of rear seats removal and use of non-electronic carbon fiber race seats.

Whether North America would receive such a model remains to be seen. The E92 M3 GTS did not make it here for homologation reasons.

that's all well and good, but some of these things are a no-brainer. why is it that the new M3/4 doesn't already use aluminum doors? carbon fiber is great and all, but I think there are much more cost-effective weight savings available from greater use of aluminum.